Electric switch



A. H. NERO.

ELECTRIC SWITCH'.

APPucATloN FILED 1AN.15. |920.

Latented Muy 23,

UNITED STATES PATENT orifice.

ARVID H. NERO, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR T0 THE ARROW ELEC- TRIO COMPANY, OF HARTFORD, CONNECTICUT, A.

CORPORATION OF CONNECTICUT.

ELECTRIC SWITCH.

Specification of Letters Patent. Patgni-@d Mfay 23, 1922 Application led January 15, 1920. Serial No. 351,661.

To all whom t may concern.'

Be it known that I, Anvil) H. NERO, a citizen of the United States of America, and residing at- New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Electric Switches, of which the following/lis a specification.

y invention relates to electric switches, and vparticularly to switches of the toggle type, the object of my invention beingl toprovide a construction of simple and compact form adapted to afford a wide break on the actuation of the mechanism.

In the accompanying drawings- Fig. l is a plan view of a switch in which my invention is embodiedin one form;

Figs. 2 and 3 are longitudinal and transverse cross sections on the lines 2 2 and 3 3, Fig. 1, respectively; and

Fig. 4 is a detached perspective of the switch mechanism and frame.

As here shown the switch comprises an insulating casing 5 of inverted cup shape adapted to be mounted in an outlet box by means of the ear pieces 6 and 7 secured at opposite ends of the casing by screws 8. The usual binding screw terminals 9, 10, 11 and 12 lie in channels 13 extending to the opposite ends of the casing, and through which the main and branch wires are led to the binding screws. 14 and 15 underlie the binding screw terminals, but within the switch chamber, and are integral with standards 16 and 17, which have offset foot pieces 18 and 1 9 into which the several binding screws respectively take to establish electrical connection with the lead wires. Additional securing screws 20 pass through the casing to aid in holding the terminal foot pieces rigidly in position.

The switch mechanism is carried by a U- shaped frame 2l, the side members of which have lugs 22 passed through slots in the brackets 23 and secured thereto by spreading thelug ends after the fashion of a rivet. The brackets are in turn supported upon the insulating casing 5 by means of screws 24 passing therethrough and taking into oii'set lugs at the baseA of the brackets.

The switch mechanism proper comprises a forked operating lever 25 pivoted on the The switch terminals thereof. An operating handle 29 is secured 1n any suitable way to the bridge 30, which unites the legs of the operating lever. Straddled by the latter is a U-shaped rocker 3l, thelegs of which are notched at their free ends and pivoted on lugs 32 struck inward from the side-plates ofthe frame 21. The legs of the rocker 31 are slotted at 33 to receive the lugs 34 offset from the lower end of the lever 25 and working therein. These slots are extended into the bridge of the rocker but leave a cross web 35 to which one end of the switch spring 36 is engaged. The other end of this spring engagesan anchor T-piece 37 passed through a hole in the bridge 38 of the switch bar yoke 39. The

` latter straddles the frame 2l, to which it is pivoted bymeans of bowed straps 40 slotted at 41 to receive the out-turned lugs 42 on the frame. The switch bars 43, which make and break contact with the switch terminals 14 and 15, are carried by yokes 39 through suit-v able insulating connections. The throw of the yoke is limited by theimpingement of its bridge piece 38 against the sides of the aperture 44 in the base of the frame in which it works. It will be noted that the switch spring 36, which is always under tension, serves to maintain both the rocker and the switch yoke seated against their pivot lugs on the frame.

The switch chamber is closed, after the assembly of the switch on the casing, by means of a metal cover 45 which is held toa marginal ledge 46-on the casing wall by the screw bolts 8. An insulating lining 47 of paper, vfiber or the like, may be utilized to faceA the metal plate.

The operation of the switch is readily understood. Assuming the parts to be in bar, whereupon the spring, further tensioned 4 by this movement, exerts its effort to throw the switch bar in the opposite direction with a snap action, thereby breaking the circuit at the terminals 14 and 15.

Various modifications in detail of oo nstruction will readily occur to those dealing with the subject, and I do not limit my claim of invention to the precise construction shown. The construction illustrated, however, possesses the merit of economical manufacture of the metal parts, facile assembly, and a quick wide break at the switch terminals.

I claim as my inventionl. In a snap switch mechanism, a pivoted llever with inwardly offset lugs at its inner end, a pivoted rocker slotted to receive said lugs, a pivotedswitch yoke and an actuating spring operatively connected between said rocker and switch yoke.

Q. In an electric switch, a U-shaped, frame having inwardly and outwardly struck bearing lugs on its' side plates, a rocker yoke lying between said side plates and pivoted on the inwardly struck lugs thereof, a switch yoke straddling the framel and pivoted on the outwardly struck lugs of the side plates, together with a switch spring operatively connecting said rocker and switch yokes,

3. In an electric switch, a U-shaped frame having inwardly and outwardly struck bearing lugs on its side plates, a rocker yoke lying between said side plates and pivoted its closed end, a binding screw terminal plate lyingfreely in said channel, a switch terminal arranged within the chamber of the insulating body and having a tapped base, in combination with a binding screw passing through said terminalplate and the closed end of the insulating body and screwing into the tapped base of the switch terminal to establish electrical connection therewith and to maintain the binding terminal plate in positiony on the base, 'substantially as described.

' In testimony whereof I have signed my name to this specification.

ARVID H. NERO. 

